rail rapid transit
a system of rail transit within an urban area that has exclusive right of way either below, above, or on the ground and so is capable of relatively high operating speed. Abbreviation: RRT
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- rail detector car,
- rail fence,
- rail gauge,
- rail gun,
- rail rage,
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019